The practice probably cannot be continued indefinitely, however, because of increasing population pressure. The largest quantities of commercial tropical products originate in plantations, where skilled management is combined with sufficient capital to provide mechanized equipment.
A machine that can cut mature corn without shattering the ripe kernels at the top of its long slender stem, gather together and convey these stem heads-first into a threshing cylinder, where the bulk of the kernels are separated from the non-grain material by a combination of impact and sieving, and where the remaining separation is achieved by a combination of further sieving, flotation and vibration.

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The practice probably cannot be continued indefinitely, however, because of increasing population pressure. The largest quantities of commercial tropical products originate in plantations, where skilled management is combined with sufficient capital to provide mechanized equipment.
A machine that can cut mature corn without shattering the ripe kernels at the top of its long slender stem, gather together and convey these stem heads-first into a threshing cylinder, where the bulk of the kernels are separated from the non-grain material by a combination of impact and sieving, and where the remaining separation is achieved by a combination of further sieving, flotation and vibration.

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